Improvement in punches for making nut-lock washers



K. H. LOOM'IS.

. PUNCHES FOR MAKING mrw-Loix WASHERS.

"Patented Dec. 14. 1875.

ITJVESSE R Q. A M By V llttorney UNITED STATES- PATENT OFFICE;

KELLOGG H. LOOMIS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOB TO WILLIAM A.LIGHTHALL, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN PUNCHES FOR MAKING NUT- LOCK WASHERS.

Specification forming part of Letters Patent No. 171,148, dated December14, 1875; application filed May 19,1875.

To all whom it may concern:

Be it known that I, KELLOGG- H. LOQMIS, of Philadelphia, in the countyof Philadelphia andin the State of Pennsylvania, have invented certainnew and useful Improvements in Punches for Making Nut-Lock Washers; anddo hereby declare that the following is a full, clear, and exactdescription thereof, reference being bad to the accompanying drawingsand to the letters of reference marked thereon, making a part of thisspecification.

The nature of my invention consists in the construction and arrangementof a punch for making that class of nut-locking washers which have acentral aperture with radial slots extending toward the corners, as willbe hereinafter more fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure 1 is a side view of the punch. Figs. 2 and 3 are longitudinalsections of the same. Fig. 4 is an end view thereof, and Fig. 5 is aperspective view of the cutting-wings.

A represents the mandrel of my punch, hav in g a hole or recess in its.lower end, into which is inserted the punch B, and held therein eitherby screw-threads, key, or other suitable means. The lower end of thepunch B is made concave to form the cutting-edge a, for punching theround hole in the washer. On

the punch, a suitable distance above the lower punching-machine, and byits operation the center hole with two radial slots is cut. Four radialslots may be cut by the addition of two more cutting-wings or sidecutters, to be held in the same manner and by the same means asdescribed above.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is a The combination of the punch B,with concave cutting-edge a, hub or elongated slotted collar 0, andcuttingwvings or side cutters D D, with the hollow mandrel A and flaringscrew-sleeve G, substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this27th day of April, 187 5.

K. H. LOOMIS. Witnesses:

O. L. Evnn'r,

HENRY E. Moss.

